CVE-2009-2891 in Riddles
Summary
by MITRE
SQL injection vulnerability in list.php in PHP Scripts Now Riddles allows remote attackers to execute arbitrary SQL commands via the catid parameter.
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Analysis
by VulDB Data Team • 07/30/2025
The vulnerability identified as CVE-2009-2891 represents a critical SQL injection flaw within the PHP Scripts Now Riddles web application, specifically affecting the list.php script. This vulnerability exposes the application to remote code execution attacks through improper input validation mechanisms. The flaw manifests when the catid parameter in the list.php file fails to adequately sanitize user-supplied input before incorporating it into SQL query constructions. This oversight creates an exploitable pathway where malicious actors can inject arbitrary SQL commands into the database query execution process, potentially gaining unauthorized access to sensitive data or executing destructive operations on the underlying database system.
The technical implementation of this vulnerability aligns with CWE-89, which categorizes SQL injection as a direct result of insufficient input validation and sanitization. The attack vector operates through HTTP requests containing malicious payloads in the catid parameter, allowing threat actors to manipulate the SQL query structure and bypass authentication mechanisms. The vulnerability demonstrates a classic example of insecure database query construction where user input is directly concatenated into SQL statements without proper parameterization or escaping mechanisms. This flaw enables attackers to perform union-based queries, error-based exploitation, or time-based blind SQL injection techniques to extract database schemas, user credentials, or other sensitive information from the affected system.
The operational impact of this vulnerability extends beyond simple data theft, potentially enabling complete system compromise and persistent access to the web application's backend infrastructure. Attackers can leverage this vulnerability to escalate privileges, modify database contents, create backdoor accounts, or even execute operating system commands if the database server permits such operations. The remote nature of the attack means that threat actors can exploit this flaw from anywhere on the internet without requiring physical access to the target network. Organizations running vulnerable versions of PHP Scripts Now Riddles face significant risk of data breaches, regulatory compliance violations, and potential legal consequences due to the exposure of sensitive information through this unpatched vulnerability.
Mitigation strategies for CVE-2009-2891 must prioritize immediate patch deployment from the vendor, as this vulnerability has been widely documented and exploited in the cybersecurity community for over a decade. Organizations should implement proper input validation and parameterized queries to prevent similar issues in their applications, following secure coding practices that align with OWASP Top Ten recommendations. Database access controls should be strengthened to limit the privileges of application accounts, implementing the principle of least privilege to minimize potential damage from successful exploitation attempts. Network segmentation and intrusion detection systems can provide additional layers of protection, while regular security assessments and vulnerability scanning should be conducted to identify and remediate similar weaknesses in the application infrastructure. The remediation approach should also include comprehensive logging and monitoring of database activities to detect anomalous patterns that might indicate exploitation attempts against this or similar vulnerabilities.